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Towards a Supertough Thermoplastic Polyisoprene Elastomer Based on a Biomimic Strategy
Angewandte Chemie International Edition ( IF 16.6 ) Pub Date : 2018-11-02 , DOI: 10.1002/anie.201809339
Maozhu Tang 1 , Rong Zhang 1 , Shiqi Li 1 , Jian Zeng 1 , Mingchao Luo 1 , Yun-Xiang Xu 1 , Guangsu Huang 1
Affiliation  

Natural rubber is one of most famous self‐reinforced rubbers thanks to the phenomenon of strain‐induced crystallization. It is usually used in a vulcanized form to enhance the mechanical strength but this results in recycling issues. Herein a thermoplastic analogue of vulcanized natural rubber is obtained as a structural mimic. Terminally functionalized polyisoprene rubber B‐4A‐PIP was prepared by using tetra‐analine as physical crosslinking units. The strong binding of tetra‐analine groups gave B‐4A‐PIP a high tensile strength (15 MPa) and breaking strain of 890 %, which is much higher than those of undecorated copolymer B‐OH‐PIP. B‐4A‐PIP has a similar onset strain of crystallization and crystallization index to vulcanized natural rubber. Randomly functionalized polyisoprene R‐4A‐PIP showed a much lower mechanical strength and SIC properties although R‐4A‐PIP and B‐4A‐PIP possessed similar molecular weights and amounts of tetra‐analine groups.

中文翻译:

基于仿生策略的超韧热塑性聚异戊二烯弹性体

由于应变引起的结晶现象,天然橡胶是最著名的自增强橡胶之一。通常以硫化形式使用以增强机械强度,但这会导致回收问题。在本文中,获得硫化天然橡胶的热塑性类似物作为结构模拟物。末端官能化聚异戊二烯橡胶B‐4A‐PIP是使用四苯胺作为物理交联单元制备的。四苯胺基团的牢固结合赋予B‐4A‐PIP高拉伸强度(15 MPa)和890%的断裂应变,远高于未装饰的共聚物B‐OH‐PIP。B‐4A‐PIP的结晶应变和结晶指数与硫化天然橡胶相似。
更新日期:2018-11-02
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